Viewing file: File.php (2.62 KB) -rw-rw-rw- Select action/file-type: (+) | (+) | (+) | Code (+) | Session (+) | (+) | SDB (+) | (+) | (+) | (+) | (+) | (+) |
<?php
/** * This class extends Cache_Lite and offers a cache system driven by a master file * * With this class, cache validity is only dependent of a given file. Cache files * are valid only if they are older than the master file. It's a perfect way for * caching templates results (if the template file is newer than the cache, cache * must be rebuild...) or for config classes... * There are some examples in the 'docs/examples' file * Technical choices are described in the 'docs/technical' file * * @package Cache_Lite * @version $Id: File.php,v 1.3 2005/12/04 16:03:55 fab Exp $ * @author Fabien MARTY <fab@php.net> */ require_once('Cache/Lite.php');
class Cache_Lite_File extends Cache_Lite {
// --- Private properties --- /** * Complete path of the file used for controlling the cache lifetime * * @var string $_masterFile */ var $_masterFile = ''; /** * Masterfile mtime * * @var int $_masterFile_mtime */ var $_masterFile_mtime = 0; // --- Public methods ---- /** * Constructor * * $options is an assoc. To have a look at availables options, * see the constructor of the Cache_Lite class in 'Cache_Lite.php' * * Comparing to Cache_Lite constructor, there is another option : * $options = array( * (...) see Cache_Lite constructor * 'masterFile' => complete path of the file used for controlling the cache lifetime(string) * ); * * @param array $options options * @access public */ function Cache_Lite_File($options = array(NULL)) { $options['lifetime'] = 0; $this->Cache_Lite($options); if (isset($options['masterFile'])) { $this->_masterFile = $options['masterFile']; } else { return $this->raiseError('Cache_Lite_File : masterFile option must be set !'); } if (!($this->_masterFile_mtime = @filemtime($this->_masterFile))) { return $this->raiseError('Cache_Lite_File : Unable to read masterFile : '.$this->_masterFile, -3); } } /** * Test if a cache is available and (if yes) return it * * @param string $id cache id * @param string $group name of the cache group * @return string data of the cache (or false if no cache available) * @access public */ function get($id, $group = 'default') { if ($data = parent::get($id, $group, true)) { if ($filemtime = $this->lastModified()) { if ($filemtime > $this->_masterFile_mtime) { return $data; } } } return false; }
}
?>
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